Google Wave is an online tool, currently in limited release, for real-time communication and collaboration. Google says, “A wave can be both a conversation and a document where people can discuss and work together using richly formatted text, photos, videos, maps, and more.”

Once it is open to the public, I’m sure a lot of people will be wondering what it is and why they should bother signing up. Here’s a quick primer on what it’s all about:

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